We present a more realistic model which involved in long-range electrostatic interaction between DNA and its counterions, and a coupled nonlinear differential system is esta-blished.

• 然后考虑DNA和抗衡离子的长程库仑作用及界面影响,计入水合层的阻尼作用及有关的耦合,自然地计算了DNA、水合层以及它们之间的静电相互作用,提出了一个更符合实际的模型,得到DNA和第一水合层系统的二阶非线性微分方程。